Power Door Locks - BUICK & CADILLAC Automatic: Description

NOTE: Also refer to Buick and Cadillac Automatic Power Door Locks in this section.

The automatic door lock system uses the conventional power door lock system, but to accomplish the automatic feature the following additional components are used: Electronic logic module, two unlock relays, a lock relay, the back-up light switch, right and left front door lock remote control handle switches, and a drivers position seat sensor (Cadillac), or a left front door lock cylinder key switch (Buick).

Location of module is under instrument panel on left side and attached to center duct panel (Cadillac). On right side under instrument panel (Buick). Lock and unlock relays are taped to module except the Cadillac lock relay which is attached to left shroud inner panel near junction block. All switches and relays are serviced as assemblies, and the module is serviced as two assemblies (module case and harness; or the printed circuit).